<li><a href="{% url 'hwam:ou_detail' u.id %}">{{ u }}</a>
    {% if u.child_ous.all %}
        <ul>
            {% for c in u.children %}
                {% with u=c template_name="hwam/ou_tree_view.html" %}
                    {% include template_name %}
                {% endwith %}
            {% endfor %}
        </ul>
    {% endif %}
</li>
